issue 1:
kinit perform differently with solaris and windows. For solaris, you can use prefix "FILE", "File", and "file" to identify the credential cache type. But for windows, only "FILE" works.

You may observe the result from the following output.

For Solaris
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lwang:/home/lw129730/Kerberos( 123 )%which java
/net/luster/export/scratch/jsn_re/jdk/jdk1.4.1/ws/build/solaris-sparc/bin/java
lwang:/home/lw129730/Kerberos( 124 )%java -version
java version "1.4.1-internal"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-internal-b3)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b08, mixed mode)
lwang:/home/lw129730/Kerberos( 125 )%which kinit
/net/luster/export/scratch/jsn_re/jdk/jdk1.4.1/ws/build/solaris-sparc/bin/kinit
lwang:/home/lw129730/Kerberos( 126 )%kinit -p -f -c file:/home/lw129730/mykrb5cc dummy bogus
lwang:/home/lw129730/Kerberos( 127 )%klist -c FILE:/home/lw129730/mykrb5cc

Credentials cache: FILE:/home/lw129730/mykrb5cc

Default principal: ###@###.###, 1 entry found.

[1] Service Principal: krbtgt/###@###.###
     Valid starting: Apr 15, 2002 20:01
     Expires: Apr 16, 2002 06:01
lwang:/home/lw129730/Kerberos( 128 )%time
799.0u 78.0s 101:11:42 0% 0+0k 0+0io 0pf+0w
lwang:/home/lw129730/Kerberos( 129 )%date
Mon Apr 15 20:02:40 PDT 2002
lwang:/home/lw129730/Kerberos( 130 )%kinit -p -f -c File:/home/lw129730/mykrb5cc1 dummy bogus
lwang:/home/lw129730/Kerberos( 131 )%klist -c FILE:/home/lw129730/mykrb5cc1

Credentials cache: FILE:/home/lw129730/mykrb5cc1

Default principal: ###@###.###, 1 entry found.

[1] Service Principal: krbtgt/###@###.###
     Valid starting: Apr 15, 2002 20:03
     Expires: Apr 16, 2002 06:03
lwang:/home/lw129730/Kerberos( 132 )%date
Mon Apr 15 20:04:15 PDT 2002
#################################################################################

Foe windows, I use jdk at /home/rammarti/temp/windows-i586
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kinit -p -f -c file:C:/liwen/mykrb5cc_liwen dummy bogus
Exception: java.lang.NullPointerException
java.lang.NullPointerException
at sun.security.krb5.internal.tools.Kinit.<init>(DashoA6275:294)
at sun.security.krb5.internal.tools.Kinit.main(DashoA6275:116)

kinit -f -p -c File:C:/liwen/mykrb5cc_liwen dummy bogus
Exception: java.lang.NullPointerException
java.lang.NullPointerException
at sun.security.krb5.internal.tools.Kinit.<init>(DashoA6275:294)
at sun.security.krb5.internal.tools.Kinit.main(DashoA6275:116)
================================================================================
issue 2:

kinit can not retrieve key from keytab for principal ticket, you may observe in the following
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lwang:/home/lw129730/Kerberos( 146 )%which java
/net/luster/export/scratch/jsn_re/jdk/jdk1.4.1/ws/build/solaris-sparc/bin/java
lwang:/home/lw129730/Kerberos( 147 )%java -version
java version "1.4.1-internal"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-internal-b3)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b08, mixed mode)
lwang:/home/lw129730/Kerberos( 148 )%which kinit
/net/luster/export/scratch/jsn_re/jdk/jdk1.4.1/ws/build/solaris-sparc/bin/kinit
lwang:/home/lw129730/Kerberos( 149 )%klist -c -k -K FILE:/home/lw129730/mykrb5tab

Key tab: FILE:/home/lw129730/mykrb5tab, 1 entry found.

[1] Service principal: ###@###.###
         KVNO: 5
         Key: 0x2022398269baddf
lwang:/home/lw129730/Kerberos( 150 )% FILE:/home/lw129730/mykrb5tab -c FILE:/home/lw129730/mykrb5cc dummy bogus
Exception: krb_error 0 Cannot retrieve key from keytab for principal ###@###.### No error
KrbException: Cannot retrieve key from keytab for principal ###@###.###
        at sun.security.krb5.internal.tools.Kinit.<init>(DashoA6275:205)
        at sun.security.krb5.internal.tools.Kinit.main(DashoA6275:116)
lwang:/home/lw129730/Kerberos( 151 )%
********************************************************************************

issue 3:

kinit treat f:/home/lw129730/mykrb5cc as illegal cache name and treat f:mykrb5cc as legal cache name. Actually both of them should be illegal.

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lwang:/home/lw129730( 241 )%which kinit
/net/luster/export/scratch/jsn_re/jdk/jdk1.4.1/ws/build/solaris-sparc/bin/kinit
lwang:/home/lw129730( 242 )%kinit -J-Djava.security.krb5.kdc=infinityzero.sfbay.sun.com -J-Djava.security.krb5.realm=JAVASOFT3.ENG.SUN.COM -f -p -c f:mykrb5cc dummy bogus
lwang:/home/lw129730( 243 )%ls f:mykrb5cc
f:mykrb5cc
lwang:/home/lw129730( 244 )%kinit -J-Djava.security.krb5.kdc=infinityzero.sfbay.sun.com -J-Djava.security.krb5.realm=JAVASOFT3.ENG.SUN.COM -f -p -c f:/home/lw129730/mykrb5cc dummy bogus
Exception: java.lang.NullPointerException
java.lang.NullPointerException
        at sun.security.krb5.internal.tools.Kinit.<init>(DashoA6275:272)
        at sun.security.krb5.internal.tools.Kinit.main(DashoA6275:104)
lwang:/home/lw129730( 245 )%
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